package com.atguigu.eduservice.listener;

import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.event.AnalysisEventListener;
import com.atguigu.eduservice.entity.EduSubject;
import com.atguigu.eduservice.entity.excel.SubjectData;
import com.atguigu.eduservice.service.EduSubjectService;
import com.atguigu.servicebase.exception.GuliException;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;

import java.util.Map;
import java.util.stream.Stream;

public class SubjectExcelListener extends AnalysisEventListener<SubjectData> {

    //因为SubjectExcelListener不能交给spring管理，需要自己new ，不能注入其它对象

    protected EduSubjectService subjectService;

    public SubjectExcelListener(){}

    public SubjectExcelListener(EduSubjectService subjectService) {
        this.subjectService = subjectService;
    }

    //读取excel内容，一行一行读取数据
    @Override
    public void invoke(SubjectData subjectData, AnalysisContext analysisContext) {
        if (subjectData == null)
            throw new GuliException(201,"文件数据为空");

        //一行一行读取数据,每次读取有两个值，第一个值一级分类，第二个值二级分类
        //判断一级分类是否重复
        EduSubject existOneSubject = this.existOneSubject(subjectService, subjectData.getOneSubjectName());
        if (existOneSubject == null) { //没有相同的一级分类再进行添加
            existOneSubject = new EduSubject();

            existOneSubject.setParentId("0");
            existOneSubject.setTitle(subjectData.getOneSubjectName());//设置从excel中读取的名称
            subjectService.save(existOneSubject);
        }

        //添加二级分类
        //获取一级分类的id值
        String pid = existOneSubject.getId();

        //判断二级分类是否重复
        EduSubject existTwoSubject = this.existTwoSubject(subjectService, subjectData.getTwoSubjectName(),pid);
        if (existTwoSubject == null) { //没有相同的一级分类再进行添加
            existTwoSubject = new EduSubject();

            existTwoSubject.setParentId(pid); //pid是一级分类的id值
            existTwoSubject.setTitle(subjectData.getTwoSubjectName());//设置从excel中读取的名称
            subjectService.save(existTwoSubject);
        }
    }


    //判断： 一级分类不能重复添加
    private EduSubject existOneSubject(EduSubjectService subjectService,String name) {
        QueryWrapper<EduSubject> wrapper = new QueryWrapper<>();
        wrapper.eq("title",name);
        wrapper.eq("parent_id","0");
        return subjectService.getOne(wrapper);
    }

    //判断： 二级分类不能重复添加
    private EduSubject existTwoSubject(EduSubjectService subjectService,String name,String pid) {
        QueryWrapper<EduSubject> wrapper = new QueryWrapper<>();
        wrapper.eq("title",name);
        wrapper.eq("parent_id",pid);
        return subjectService.getOne(wrapper);
    }

    @Override
    public void doAfterAllAnalysed(AnalysisContext analysisContext) {
    }
}
